diff --git a/stack.yaml b/stack.yaml
index 975ca4ad0..17c56ef9b 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,18 +1,21 @@
-# stack is used for circleci and appveyor CI builds
-resolver: lts-15.8
+resolver: lts-16.26 # 2020-12-13, GHC 8.8.4
+
 flags:
-    postgrest:
-        FailOnWarn: true
+  postgrest:
+    FailOnWarn: true
+
 nix:
-  packages: [pcre, pkgconfig, postgresql, zlib]
+  packages:
+    - pcre
+    - pkgconfig
+    - postgresql
+    - zlib
   # disable pure by default so that the test enviroment can be passed
   pure: false
+
 extra-deps:
-- configurator-pg-0.2.2@sha256:8f3f7c66dd4a53852283c70806ebc101a7219f8b01c3e80c5130e9749c998dc8,2987
-- hspec-wai-json-0.10.1@sha256:67b405c38f0a9e2771480c8d3ecd8aeb8d8776a35d3b2906cb1b76c9538617e4,1629
-- interpolatedstring-perl6-1.0.2@sha256:7ce49c8a69a2a1b89c001ed79db2aab656ffd0faf2a7a701a553b6deb5c8ba7f,1073
-- protolude-0.3.0@sha256:8361b811b420585b122a7ba715aa5923834db6e8c36309bf267df2dbf66b95ef,2693
-- hasql-notifications-0.1.0.0@sha256:9ab112d2bb5da0d55abd65f0d27a7bb1dc4aeb792518d9a2ea8a16e243e19985,2156
-- hasql-dynamic-statements-0.3.1@sha256:c3a2c89c4a8b3711368dbd33f0ccfe46a493faa7efc2c85d3e354c56a01dfc48,2673
-- hasql-implicits-0.1.0.2@sha256:5d54e09cb779a209681b139fb3cc726bae75134557932156340cc0a56dd834a8,1361
-- ptr-0.16.7.2@sha256:4a91e1342db8e627435a002798d65329a0c09c8632b2e415461b9928785327f9,2686
+  - protolude-0.3.0@sha256:8361b811b420585b122a7ba715aa5923834db6e8c36309bf267df2dbf66b95ef,2693
+  - hasql-notifications-0.1.0.0@sha256:9ab112d2bb5da0d55abd65f0d27a7bb1dc4aeb792518d9a2ea8a16e243e19985,2156
+  - hasql-dynamic-statements-0.3.1@sha256:c3a2c89c4a8b3711368dbd33f0ccfe46a493faa7efc2c85d3e354c56a01dfc48,2673
+  - hasql-implicits-0.1.0.2@sha256:5d54e09cb779a209681b139fb3cc726bae75134557932156340cc0a56dd834a8,1361
+  - ptr-0.16.7.2@sha256:4a91e1342db8e627435a002798d65329a0c09c8632b2e415461b9928785327f9,2686
diff --git a/stack.yaml.lock b/stack.yaml.lock
index aeefaaa31..b0d652348 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -4,27 +4,6 @@
 #   https://docs.haskellstack.org/en/stable/lock_files
 
 packages:
-- completed:
-    hackage: configurator-pg-0.2.2@sha256:8f3f7c66dd4a53852283c70806ebc101a7219f8b01c3e80c5130e9749c998dc8,2987
-    pantry-tree:
-      size: 2462
-      sha256: a669366632e19f396dfe52599d54414b9c92d5664ea4391c2c797be271f9aa0e
-  original:
-    hackage: configurator-pg-0.2.2@sha256:8f3f7c66dd4a53852283c70806ebc101a7219f8b01c3e80c5130e9749c998dc8,2987
-- completed:
-    hackage: hspec-wai-json-0.10.1@sha256:67b405c38f0a9e2771480c8d3ecd8aeb8d8776a35d3b2906cb1b76c9538617e4,1629
-    pantry-tree:
-      size: 349
-      sha256: fb9e89b79cde3276baa484c860c6b9eeebdbc1a5c43301293351a25bc4c08e87
-  original:
-    hackage: hspec-wai-json-0.10.1@sha256:67b405c38f0a9e2771480c8d3ecd8aeb8d8776a35d3b2906cb1b76c9538617e4,1629
-- completed:
-    hackage: interpolatedstring-perl6-1.0.2@sha256:7ce49c8a69a2a1b89c001ed79db2aab656ffd0faf2a7a701a553b6deb5c8ba7f,1073
-    pantry-tree:
-      size: 300
-      sha256: f7f0b06c58db814d1f12ed6f4f4cb67ff8c72e51da61c04db12c2aedb896542e
-  original:
-    hackage: interpolatedstring-perl6-1.0.2@sha256:7ce49c8a69a2a1b89c001ed79db2aab656ffd0faf2a7a701a553b6deb5c8ba7f,1073
 - completed:
     hackage: protolude-0.3.0@sha256:8361b811b420585b122a7ba715aa5923834db6e8c36309bf267df2dbf66b95ef,2693
     pantry-tree:
@@ -39,9 +18,30 @@ packages:
       sha256: 3f5c51ec2bc7b58b5b6e8c871c8ed903a8dd1fbbb37cce9607407933d678e205
   original:
     hackage: hasql-notifications-0.1.0.0@sha256:9ab112d2bb5da0d55abd65f0d27a7bb1dc4aeb792518d9a2ea8a16e243e19985,2156
+- completed:
+    hackage: hasql-dynamic-statements-0.3.1@sha256:c3a2c89c4a8b3711368dbd33f0ccfe46a493faa7efc2c85d3e354c56a01dfc48,2673
+    pantry-tree:
+      size: 641
+      sha256: b1b9a6a26ec765e5fe29f9a670a5c9ec7067ea00dee8491f0819284ff0201b6f
+  original:
+    hackage: hasql-dynamic-statements-0.3.1@sha256:c3a2c89c4a8b3711368dbd33f0ccfe46a493faa7efc2c85d3e354c56a01dfc48,2673
+- completed:
+    hackage: hasql-implicits-0.1.0.2@sha256:5d54e09cb779a209681b139fb3cc726bae75134557932156340cc0a56dd834a8,1361
+    pantry-tree:
+      size: 310
+      sha256: 2f00d1467d0e226b966c2cd7bac433c8948e2f7bbdf8a44936029f66fc20b5f3
+  original:
+    hackage: hasql-implicits-0.1.0.2@sha256:5d54e09cb779a209681b139fb3cc726bae75134557932156340cc0a56dd834a8,1361
+- completed:
+    hackage: ptr-0.16.7.2@sha256:4a91e1342db8e627435a002798d65329a0c09c8632b2e415461b9928785327f9,2686
+    pantry-tree:
+      size: 1089
+      sha256: 061c2c8a357cb4d6a03c915dba627971a28460746dd47f662496ae4f2c91a6b6
+  original:
+    hackage: ptr-0.16.7.2@sha256:4a91e1342db8e627435a002798d65329a0c09c8632b2e415461b9928785327f9,2686
 snapshots:
 - completed:
-    size: 492015
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/15/8.yaml
-    sha256: 926bc3d70249dd0ba05277ff00943c0addb35b627cb641752669e7cf771310d0
-  original: lts-15.8
+    size: 533252
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/16/26.yaml
+    sha256: cdbc5db9c1afe80a5998247939027a0c7db92fa0f20b5cd01596ec3da628b622
+  original: lts-16.26